remove debugging messages, add +cr for write statements, reduce fma_npart_max to 70 as maximum number of particles in sixtrack is anyway 64.
remove debugging messages, add +cr for write
statements, reduce fma_npart_max to 70 as
maximum number of particles in sixtrack is
anyway 64.

SixTrack/SixTrack,SixTrack/SixTrack,SixTrack/SixTrack,SixTrack/SixTrack,SixTrack/SixTrack,SixTrack/SixTrack